ETH Zurich, Institute for Biomechanics, Hönggerbergring 64, 8093, Zurich, Switzerland.
Swiss Federal Institute of Sport Magglingen (SFISM), Hauptstrasse 247, 2532, Magglingen, Switzerland.
BMC Res Notes. 2023 Apr 22;16(1):59. doi: 10.1186/s13104-023-06328-9.
Artistic gymnastics is a sport where most athletes start at an early age and training volumes are high. Hence, overuse and acute injuries are frequent due to the load endured during landing tasks. During landing, the ground reaction force (GRF) is up to 15.8 times the body weight and therefore reliable GRF measurements are crucial. The gold standard for GRF measurements are force plates. As force plates are mostly used in a constrained laboratory environment, it is difficult to measure the GRF in representative training settings. Textile insoles (novel GmbH, Munich, Germany) exist, which can be used to measure dynamic GRF. Hence, the motivation of this study is to test the validity and reliability of these insoles during landing tasks. GRF was measured during four different exercises, in two test subjects and compared to concurrent force plate data.
Twelve out of 16 statistical parametric mapping plots showed no significant difference between the measured force curves of insoles and force plates. Across conditions, the root mean square error of the maximal vertical GRF was 21 N/kg and an impulse 0.4 Ns/kg. The intraclass correlation coefficient (ICC 2,1) ranged from 0.02 to 0.76 for maximal vertical GRF and from - 0.34 to 0.76 for impulse. The insoles are a valid measurement tool for GRF curve progression and impulse during landing but underestimate the maximal vertical GRF.
艺术体操是一项大多数运动员从很小就开始从事的运动，训练量很大。因此，由于在着陆任务中承受的负荷，运动员经常会出现过度使用和急性损伤。在着陆时，地面反作用力（GRF）高达体重的 15.8 倍，因此可靠的 GRF 测量至关重要。GRF 测量的金标准是力量板。由于力量板主要用于受限制的实验室环境，因此很难在代表性的训练环境中测量 GRF。存在可用于测量动态 GRF 的纺织鞋垫（novel GmbH，慕尼黑，德国）。因此，本研究的动机是测试这些鞋垫在着陆任务中的有效性和可靠性。在两个测试对象的四项不同练习中测量了 GRF，并与同时进行的力板数据进行了比较。
在 16 个统计参数映射图中，有 12 个图显示鞋垫和力板测量的力曲线之间没有显着差异。在所有条件下，最大垂直 GRF 的均方根误差为 21N/kg，冲量为 0.4Ns/kg。最大垂直 GRF 的组内相关系数（ICC 2,1）范围为 0.02 至 0.76，冲量为-0.34 至 0.76。鞋垫是测量着陆时 GRF 曲线进展和冲量的有效工具，但低估了最大垂直 GRF。
